I've allready posted this on the dvd:rip-user mailing list.
Hope you don't mind, that I rephrase my question here,
since - I really don't want to be impolite - the list doesn't seem to be very active.
It might be that someone knows an answer.

I have two machines. On both machines there is the same version of dvd::rip installed - namely

On machine 1 the -ss option contains a "," instead of a "." ..... I can replace the "," by a "." and run the command manually with success.
I still have an older version of perl installed on machine 2: